Some wxPerl notes.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27039 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/event.tex

@@ -4,6 +4,9 @@ An event is a structure holding information about an event passed to a
 callback or member function. {\bf wxEvent} used to be a multipurpose
 event object, and is an abstract base class for other event classes (see below).
 
+\perlnote{In wxPerl custome event classes should be derived from
+\texttt{Wx::PlEvent} and \texttt{Wx::PlCommandEvent}.}
+
 \wxheading{Derived from}
 
 \helpref{wxObject}{wxobject}